CVE-2021-42358: Contact Form With Captcha <= 1.6.2 Cross-Site Request Forgery to Reflected Cross-Site Scripting

Severity: medium (CVSS 6.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-29 · updated 2026-06-17
Weakness: CWE-352

Description

The Contact Form With Captcha WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation in the ~/cfwc-form.php file during contact form submission, which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 1.6.2.

Affected products

Contact Form With Captcha Project Contact Form With Captcha: through 1.6.2

References

https://plugins.trac.wordpress.org/browser/contact-form-with-captcha/trunk/cfwc-form.php#L17
https://wordfence.com/vulnerability-advisories/#CVE-2021-42358
https://plugins.trac.wordpress.org/browser/contact-form-with-captcha/trunk/cfwc-form.php#L17
https://wordfence.com/vulnerability-advisories/#CVE-2021-42358

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